I could valve you could valve she could valve we could valve you could valve they could valve
Forme en V-ing
I could be valving you could be valving she could be valving we could be valving you could be valving they could be valving
Perfect
I could have valved you could have valved she could have valved we could have valved you could have valved they could have valved
Perfect en V-ing
I could have been valving you could have been valving she could have been valving we could have been valving you could have been valving they could have been valving
Négation
Forme simple
I couldn't valve you couldn't valve she couldn't valve we couldn't valve you couldn't valve they couldn't valve
Forme en V-ing
I couldn't be valving you couldn't be valving she couldn't be valving we couldn't be valving you couldn't be valving they couldn't be valving
Perfect
I couldn't have valved you couldn't have valved she couldn't have valved we couldn't have valved you couldn't have valved they couldn't have valved
Perfect en V-ing
I couldn't have been valving you couldn't have been valving she couldn't have been valving we couldn't have been valving you couldn't have been valving they couldn't have been valving
Forme interrogative
Forme simple
could I valve? could you valve? could she valve? could we valve? could you valve? could they valve?
Forme en V-ing
could I be valving? could you be valving? could she be valving? could we be valving? could you be valving? could they be valving?
Perfect
could I have valved? could you have valved? could she have valved? could we have valved? could you have valved? could they have valved?
Perfect en V-ing
could I have been valving? could you have been valving? could she have been valving? could we have been valving? could you have been valving? could they have been valving?
Forme interro-négative
Forme simple
couldn't I valve? couldn't you valve? couldn't she valve? couldn't we valve? couldn't you valve? couldn't they valve?
Forme en V-ing
couldn't I be valving? couldn't you be valving? couldn't she be valving? couldn't we be valving? couldn't you be valving? couldn't they be valving?
Perfect
couldn't I have valved? couldn't you have valved? couldn't she have valved? couldn't we have valved? couldn't you have valved? couldn't they have valved?
Perfect en V-ing
couldn't I have been valving? couldn't you have been valving? couldn't she have been valving? couldn't we have been valving? couldn't you have been valving? couldn't they have been valving?